Valve-gear for engines.



. No. 680,666. PatentedAug. l3, I90l...v

B. V. NORDBERG;

VALVE GEAR FUR ENGINES.

(Apialicationfiled June 28, 1894'.) (No Model.) 2 Sheets-Sheet I.

No. 680,666. Patented Aug. I3, 1901.

B. V. NOBDBERG.

VALVE GEAR FOR ENGINES.

(Application filed June 28, 1894.) (No Model. 2 Sheets-Sheet 2.

Tnz NORRIS PETERS cu. FHQTQ-LITHO., WASKINGTDN, a. c.

UNITED STATES PATENT EErcE.

BRUNO v. NORDBERG, or MILWAUKEE, WISCONSIN, ASSIGNOR TO NORDBERGMANUFACTURING COMPANY, OF SAME PLACE.

VALVE-G EAR FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 680,666, dated August13, 1901.

Application filed June 28,1894. Serial No. 515,928. (No model.)

T at whom it may concern:

Be it known that I, BRUNO'V. NORDBERG, of Milwaukee, in the county ofMilwaukee and State of W'isconsimhave invented certain new and usefulImprovements in Valve-Gear for Engines; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it pertains to makeand use the same, reference being had to the accompanying drawings, andto the letters of reference marked thereon, which form a part of thisspecification.

The main objects of my invention are to provide for the adjustment andfastening of the trip blocks or steels while the engine is running andgenerally to improve the construction and operation of valve-gear of theclass to which my invention relates.

2o It consists of certain peculiarities in the construction andarrangement of the component parts of the valve-gear hereinafterparticularly described, and pointed out in claims.

In the accompanying drawings like letters 2 5 designate the same partsin the several fignres.

Figure 1 is a front elevation of my improved valve-gear, showing thetrip-blocks engaged in position to open the steam-valve. Fig. 2

3c is a vertical section on the line 2 2, Fig. 5, showing the gear atthe point of being tripped. Fig. 3 is a front elevation showing the geartripped. Fig. 4 is a vertical section on the line 4: 4, Fig. 5, thewrist-plate, dash-pot, and

governor connections beingindicated in Figs.

2, 3, and 4: by dotted lines. Fig. 5 is a horizontal section on the line5 5, Fig. 6; and Fig.

6 is a partial vertical section and sideelevation on the line 6 6, Fig.5.

A designates the bonnet, which is formed in the usual manner with aflange Ct, by which it is bolted to the cylinder, and with bearings forthe Valve-stem. It is provided with the usual stuffing box and gland a,as shown in Figs. 5 and 6, and has a cylindrical extension 0. at itsouter end, upon which are mounted the valve-opening lever and theknock-off plate, as hereinafter explained.

B designates the valve-stem, which is provided with a collar or shoulder12, as shown in Figs. 5 and 6, to receive the outward end thrust uponthe stem and to hold it in its proper place.

G is the valve-closing or drop lever, which is fixed to the outer end ofthe valve-stem B. It is adjustably connected by a rod 0 with a dash-potor other valve-closing device (not shown) in the usual manner and isformed at the end on the under side with a seat for a trip block orsteel 0, which is secured thereto by a bolt 0 passing through a verticalhole in it and said lever and provided at its upper threaded end with anut which is always exposed and accessible whether the engine is at restor in operation.

D is an elbow-shaped valve-opening lever, formed at one end with a hubd, which is loosely mounted and capable of turning on the extension 0.of the bonnet, as clearly shown in Figs. 2 and 6. It is adjustablyconneoted at the opposite end by a rod d with the wrist-plate or othervalve-opening device (not shown) in the usual manner. At the elbow saidlever is formed parallel with the hub 01 with sleeve 61*, in which isfitted a rocking pin E. This pin is provided at the front or outer endwith an ofiset arm 6, formed at the end with a seat for the attachmentof a trip block or steel 6', which is secured thereto by a bolt e thenut of which is constantly 8o exposed and accessible. The seats for thetrip blocks or steels on lever O and the arm e are formed in planeswhich are parallel with each other when the trip blocks or steelsarebrought into engagement, as shown in Figs. 1 and 2. By thearrangement and mode of attachment of the trip-steels, which are made,as shown, of a flattened quadrangular shape, they can be reversed orturned so as to utilize either of the four corners of each steel forengagement with the other steel, and the nut on the upper exposed end ofthe bolt by which each steel is secured in place is always exposed andeasily accessible whether the engine is running or at rest, so thateither nut may be tightened and either trip-steel secured in placewithout stopping the engine. This is of great importance in enginesemployed in rolling-mills, where the stopping of the engine by the Wear,loosening, or displacement of the trip-steels often causes seriousinconvenience and damage.

At its opposite and inner end the rocking pin E is provided with a barF, which is fitted and secured in a slot therein and projecis onopposite sides thereof into radiating recesses in the adjacent end ofthe sleeve (1 as shown in'Fig. 4. ('esses is formed to limit themovement of the bar I1 and said rocking pin, as desired. A fiat springf,bearing at its lowerend against one side of the upper recess in sleeved", is secured atits upper end to the bar F and presses said bar towardthe valve-stem.

G designates the knock-oft plate, which is loosely mounted so as to turnupon the extension a of the bonnet next inside of the valve-openinglever B. It is connected in the usual manner by a rod g with the govemor or other controlling device (not shown) and is formed with a seat onits periphery for the attachment of a cam-block g, which is made toproject beyond the connection of the rod g with said plate, so thatitmay be turned after being attached to said plate to shape in a lathe bya rapid movement, thereby greatly facilitating the construction andfitting of this part of the valvegear. The cam-block g is arranged inthe path of the bar F andv by engagement therewith turns the rocking pinE and swings the arm e at its opposite end outward, so as to disengagethe trip block or steel e from the trip block or steel 0, carried by thelever O, and thus permit the instant closing of the steam-valve by thedash-pot or other device employed for that purpose.

It is to be understood that the point at which the trip blocks or steelswill be disengaged varies according to the position of the cam-block g,which is controlled in the usual mannerby the governor or controllingconnection through the rod 9. The valve-opening lever D is formed on theouter side next to the valve-closing lever C with a projection d asshown in Figs. 2, 5, and 6, in position to engage with theinwardly-projecting end of the pivot-pin 0 by which the rod 0 isconnectedwith said lever O. The return movement of lever D after openingthe steam-valve is thus caused to close said valve in case the dash-potor valve-closing device fails to operate. Besides securing theadvantages hereinbefore stated, the valve-gear, as shown and described,is simple in construction and etticient in operation.

Various modifications in minor details of construction may be madewithin the intended scope of my invention.

I claim- 1. In a valve-gear for engines, the combination with thevalve-stem, of avalve-closing 1ever fixed thereon and formed on theunderside with a seat in a plane radial to the valve-stem, anadjust-able trip-block secured to said seat by a bolt passingtransversely through said lever and always accessible on the upper sidethereof whatever the position of the valvegear may be, a valve-openinglever, a rocking One or both of these repin j ournaled in saidvalveopenin g lever and provided at one end with an upwardly-projectingarm the free end of which is movable into and out of the path of thevalve-closing lever and at the opposite end with a bar passing through arecess in the sleeve of the rocking pin, and a knock-oit plate adaptedto engage said bar and to disengage the valve closing and openinglevers, substantially as and for the purposes described.

2. In a valve-gear for engines, the combination with the valve-stem, ofa valve-closing lever fixed thereon, a valve-opening lever, a rockingpin journaled in said opening-lever and having at one end anupwardly-extending arm and at the other end a bar passing through arecess in the sleeve of the rocking pin, adjustable trip-blocks securedrespectively to the upper end of said arm and the underside of thevalve-closing lever by bolts, one end of each of which bolts isconstantly exposed and accessible, and a knock-off plate adapted toengage said bar and to disengage the valve closing and opening levers,substantially as and for the purposes described.

3. In a valve-gear for engines, the combination with the valve-stem, ofthe valve-closing lever fixed thereon, and the'valve-opening leverprovided with a rocking pin between the valve-stem and wrist-plateconnection, said rocking pin being provided with an upwardlyextendingarm formed at its upper end with a trip-block seat, and a removable andadjustable trip-block secured to said seat by a bolt one end of which isconstantly exposed and accessible, the free end of said arm carrying theadjustable block being movable into and out of the path of thevalve-closing lever, substantially as and for the purposes described.

4:. In a valve-gear for engines, the combination with the valve-stem, ofa valve-closing lever fixed thereon and form ed on the under side with aseat in aplane radial to the valve-stem, a trip-block secured to saidseat bya bolt one end of which is always exposed and accessible, avalve-openinglever provided with a rocking pin between the valve-stemand wristplate connection, said rocking pin being provided with anupwardly-extending arm formed at its upper end with a trip-block seat,and a removable and adjustable trip-block secured to said seat by a boltone end of which is constantly exposed and accessible, substantially asand for the purposes described.

5. In valve-gear for engines the combination with the valve-stem, of avalve-opening lever formed with a sleeve parallel with said stem, arocking pin journaled in said sleeve and provided atone end with atrip-arm and at the opposite end with a bar which projects through, andis limited in movement by a ra dial recess in said sleeve, a knock-offplate and a spring pressing said bar toward said knock-off plate,substantially as and for the purposes set forth.

6. In valve-gear for engines the combination with a valve-stem andbonnet, of a valve closing lever fixed on said stem and providedwith atrip-block, a valve-opening lever formed at one end witha hub which isloosely mounted so as to turn on said bonnet and with aparallel sleeve,a rocking pin journaled in said sleeve and provided at one end with abar and at the other with an arm carrying a trip-block at its end, aknock -off plate loosely mounted so as to turn on said bonnet and aspring pressing said bar toward said plate substantially as and for thepurposes set forth.

7. In valve-gear for engines the combination with the valve-stem andbonnet provided with bearings therefor, of an elbow-shaped valve-openinglever formed at one end with a hub which is loosely mounted so as toturn upon said bonnet and at its elbow with -a sleeve parallel with saidhub, a rocking pin journaled in said sleeve and provided at one end witha bar projecting radially therefrom' and at the other end with an offsetarm formed at the end with a seat, a trip-block secured to said seat, avalve-closing lever fixed upon the outer end of said stem next to thevalve-opening lever and formed at the end on the under side with a seat,a tripblock secured to said seat, a knock-off plate loosely mounted soas to turn upon said bonnet on the opposite side of the valve-openinglevel-from the valve-closinglever and formed on its periphery with aseat to which acamblock is secured, and a spring pressing the bar ofsaid rocking pin toward said knock-off plate, substantially as and forthe purposes set forth.

S. In valve-gear for engines the combination with the valve-stem, of avalve-closing lever fixed thereon, an independently-movablevalve-opening lever, an arm pivotally connected with the valve-openinglever and movable at its free end into and out of the path of thevalve-closing lever, said arm and said valve-closing lever being formedon the end and side respectively with seats in planes which are parallelwith each other when the trip-blocks are in engaging position, andtripblocks secured to said seats by bolts which are constantly exposedand accessible at one end, substantially as and for the purposes setforth.

9. In valve-gear for engines the combination with the valve-stem, of avalve-closing lever fixed thereon and pivoted to its actuat ingconnecting-rod by a pin projecting therefrom on one side and anindependently-mov able valve-openin g lever provided with a projectionon one side in the path of the projecting end of said pin, substantiallyas and for the purposes set forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

BRUNO V. NORDBERG.

Witnesses:

CHAS. L. Goss, JOHN A. Goss.

